From 02fd80e16018d44374063bae703352c464fdec2c Mon Sep 17 00:00:00 2001 From: Iago Toral Quiroga Date: Thu, 5 Jun 2014 11:36:56 +0200 Subject: [PATCH] glsl: Fail to link if inter-stage input/outputs are not assigned to stream 0 Outputs that are linked to inputs in the next stage must be output to stream 0, otherwise we should fail to link. Reviewed-by: Ian Romanick --- src/glsl/link_varyings.cpp | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/glsl/link_varyings.cpp b/src/glsl/link_varyings.cpp index 9725a43..3b20594 100644 --- a/src/glsl/link_varyings.cpp +++ b/src/glsl/link_varyings.cpp @@ -1345,6 +1345,14 @@ assign_varying_locations(struct gl_context *ctx, if (input_var || (prog->SeparateShader && consumer == NULL)) { matches.record(output_var, input_var); } + + /* Only stream 0 outputs can be consumed in the next stage */ + if (input_var && output_var->data.stream != 0) { + linker_error(prog, "output %s is assigned to stream=%d but " + "is linked to an input, which requires stream=0", + output_var->name, output_var->data.stream); + return false; + } } } else { /* If there's no producer stage, then this must be a separable program. -- 2.7.4